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/* BFD back-end for Irix core files.

   Copyright 1993, 1994, 1996, 1999, 2001 Free Software Foundation, Inc.

   Written by Stu Grossman, Cygnus Support.

   Converted to back-end form by Ian Lance Taylor, Cygnus Support

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* This file can only be compiled on systems which use Irix style core

   files (namely, Irix 4 and Irix 5, so far).  */

#include "bfd.h"

#include "sysdep.h"

#include "libbfd.h"

#ifdef IRIX_CORE

#include <core.out.h>

struct sgi_core_struct

{

  int sig;

  char cmd[CORE_NAMESIZE];

};

#define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)

#define core_signal(bfd) (core_hdr(bfd)->sig)

#define core_command(bfd) (core_hdr(bfd)->cmd)

static asection *make_bfd_asection

  PARAMS ((bfd *, CONST char *, flagword, bfd_size_type, bfd_vma, file_ptr));

static const bfd_target *irix_core_core_file_p PARAMS ((bfd *));

static char *irix_core_core_file_failing_command PARAMS ((bfd *));

static int irix_core_core_file_failing_signal PARAMS ((bfd *));

static boolean irix_core_core_file_matches_executable_p

  PARAMS ((bfd *, bfd *));

static asymbol *irix_core_make_empty_symbol PARAMS ((bfd *));

static void swap_abort PARAMS ((void));

static asection *

make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)

     bfd *abfd;

     CONST char *name;

     flagword flags;

     bfd_size_type _raw_size;

     bfd_vma vma;

     file_ptr filepos;

{

  asection *asect;

  asect = bfd_make_section_anyway (abfd, name);

  if (!asect)

    return NULL;

  asect->flags = flags;

  asect->_raw_size = _raw_size;

  asect->vma = vma;

  asect->filepos = filepos;

  asect->alignment_power = 4;

  return asect;

}

static const bfd_target *

irix_core_core_file_p (abfd)

     bfd *abfd;

{

  int val;

  int i;

  char *secname;

  struct coreout coreout;

  struct idesc *idg, *idf, *ids;

  val = bfd_read ((PTR)&coreout, 1, sizeof coreout, abfd);

  if (val != sizeof coreout)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_wrong_format);

      return 0;

    }

#ifndef CORE_MAGICN32

#define CORE_MAGICN32 CORE_MAGIC

#endif

  if ((coreout.c_magic != CORE_MAGIC && coreout.c_magic != CORE_MAGICN32)

      || coreout.c_version != CORE_VERSION1)

    return 0;

  core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, sizeof (struct sgi_core_struct));

  if (!core_hdr (abfd))

    return NULL;

  strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);

  core_signal (abfd) = coreout.c_sigcause;

  if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)

    return NULL;

  for (i = 0; i < coreout.c_nvmap; i++)

    {

      struct vmap vmap;

      val = bfd_read ((PTR)&vmap, 1, sizeof vmap, abfd);

      if (val != sizeof vmap)

        break;

      switch (vmap.v_type)

        {

        case VDATA:

          secname = ".data";

          break;

        case VSTACK:

          secname = ".stack";

          break;

#ifdef VMAPFILE

        case VMAPFILE:

          secname = ".mapfile";

          break;

#endif

        default:

          continue;

        }

      /* A file offset of zero means that the section is not contained

         in the corefile.  */

      if (vmap.v_offset == 0)

        continue;

      if (!make_bfd_asection (abfd, secname,

                              SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS,

                              vmap.v_len,

                              vmap.v_vaddr,

                              vmap.v_offset))

        return NULL;

    }

  /* Make sure that the regs are contiguous within the core file. */

  idg = &coreout.c_idesc[I_GPREGS];

  idf = &coreout.c_idesc[I_FPREGS];

  ids = &coreout.c_idesc[I_SPECREGS];

  if (idg->i_offset + idg->i_len != idf->i_offset

      || idf->i_offset + idf->i_len != ids->i_offset)

    return 0;                    /* Can't deal with non-contig regs */

  if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)

    return NULL;

  make_bfd_asection (abfd, ".reg",

                     SEC_HAS_CONTENTS,

                     idg->i_len + idf->i_len + ids->i_len,

                     0,

                     idg->i_offset);

  /* OK, we believe you.  You're a core file (sure, sure).  */

  bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);

  return abfd->xvec;

}

static char *

irix_core_core_file_failing_command (abfd)

     bfd *abfd;

{

  return core_command (abfd);

}

static int

irix_core_core_file_failing_signal (abfd)

     bfd *abfd;

{

  return core_signal (abfd);

}

static boolean

irix_core_core_file_matches_executable_p (core_bfd, exec_bfd)

     bfd *core_bfd, *exec_bfd;

{

  return true;                  /* XXX - FIXME */

}

static asymbol *

irix_core_make_empty_symbol (abfd)

     bfd *abfd;

{

  asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));

  if (new)

    new->the_bfd = abfd;

  return new;

}

#define irix_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound

#define irix_core_get_symtab _bfd_nosymbols_get_symtab

#define irix_core_print_symbol _bfd_nosymbols_print_symbol

#define irix_core_get_symbol_info _bfd_nosymbols_get_symbol_info

#define irix_core_bfd_is_local_label_name \

  _bfd_nosymbols_bfd_is_local_label_name

#define irix_core_get_lineno _bfd_nosymbols_get_lineno

#define irix_core_find_nearest_line _bfd_nosymbols_find_nearest_line

#define irix_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol

#define irix_core_read_minisymbols _bfd_nosymbols_read_minisymbols

#define irix_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol

/* If somebody calls any byte-swapping routines, shoot them.  */

static void

swap_abort()

{

  abort(); /* This way doesn't require any declaration for ANSI to fuck up */

}

#define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )

#define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )

#define NO_SIGNED_GET \

  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )

const bfd_target irix_core_vec =

  {

    "irix-core",

    bfd_target_unknown_flavour,

    BFD_ENDIAN_BIG,             /* target byte order */

    BFD_ENDIAN_BIG,             /* target headers byte order */

    (HAS_RELOC | EXEC_P |       /* object flags */

     HAS_LINENO | HAS_DEBUG |

     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),

    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */

    0,                                                      /* symbol prefix */

    ' ',                                                   /* ar_pad_char */

    16,                                                    /* ar_max_namelen */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */

    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */

    {                           /* bfd_check_format */

     _bfd_dummy_target,         /* unknown format */

     _bfd_dummy_target,         /* object file */

     _bfd_dummy_target,         /* archive */

     irix_core_core_file_p      /* a core file */

    },

    {                           /* bfd_set_format */

     bfd_false, bfd_false,

     bfd_false, bfd_false

    },

    {                           /* bfd_write_contents */

     bfd_false, bfd_false,

     bfd_false, bfd_false

    },

       BFD_JUMP_TABLE_GENERIC (_bfd_generic),

       BFD_JUMP_TABLE_COPY (_bfd_generic),

       BFD_JUMP_TABLE_CORE (irix_core),

       BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),

       BFD_JUMP_TABLE_SYMBOLS (irix_core),

       BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),

       BFD_JUMP_TABLE_WRITE (_bfd_generic),

       BFD_JUMP_TABLE_LINK (_bfd_nolink),

       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

    NULL,

    (PTR) 0                      /* backend_data */

};

#endif /* IRIX_CORE */